EE has also opened its pre-orders for the device, offering various 4G packages starting at £31 per month. The Orange and T-Mobile merger is also throwing in the accessories kit for users who place their order between April 26.

Photo gallery - the Galaxy S4 in pictures:

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Samsung has unveiled its brand new Galaxy S4 smartphone at its high-profile 'Unpacked 2013' launch event in New York City.
Copyright: PA Images Jason DeCrow / AP
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O2 is offering unlimited calls and texts with 2GB of data at the more expensive price of £47 per month, though users can make savings in the long run by paying £99.99 for the handset upfront on a £37-per-month deal.

Vodafone is offering the same premium package as O2 for the less costly price of £42 per month on a two-year contract. Customers who trade in their existing handset are entitled to the same deal for £37 per month.